As far as an LLM is concerned, there is no difference between "negative" hallucination and a positive one. It's all just tokens and embeddings to it.
Positive hallucinations are more likely to happen nowadays, thanks to all the effort going into these systems.
This basically ruins the term “hallucination” and makes it meaningless, when the term actually describes a real phenomenon.
That's the point. It is meaningless. When it first coined, there were already detractors to the term, that it is an incorrect description of the phenomenon. But it stuck.